Door check and spring.



PATENTED JULY 14, 1,908.

B. M. MICK.

DOOR CHECK AND SPRING.

' APPLICATION FILED JUNE 24.1907.

2 SHEETSSIIEET 1.

witnesses Q 4.4%? a Wm No. 893,185. PATENTED JULY 14, 1908. R. M. MICK. DOOR CHECK AND SPRING.

APPLICATION FILED JUNE 24,1907.

2 SHEETS-SHEET 2.

' door.

UNITED STATES PATENT OFFICE.

RICHARD M. MICK, OF BUSSEY, IOWA, ASSIGNOR OF ONE-HALF TO WILLIAM A. AMSBERRY, OF BUSSEY, IOWA.

DOOR CHECK AND SPRING.

No. coarse.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed June 2%, 1907. Serial No. 380,641.

rable and inexpensive construction especially designed for use in connection with screen or other light doors.

More specifically it is my object to provide a device of this kind in which all of the Weight is carried upon the door frame so as to relieve the door of any extra weight.

'A further object is to provide a device of this kind in which the tension of the spring is exerted upon the door when it is at or near its closed position, so that the door is held firmly closed, and further in this connection to provide a spring and lever device so arranged that when the door is substantially at right angles to the frame, the tension of the spring will be neutralized, and upon the movement of the door either to the right or left of said angle the spring will act to either open or close the door.

My invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in'my claims and illustrated in the accompanying drawings, in

which Figure l shows a perspective view of a dc vice embodying my invention, and applied to a door frame and door. Fig. 2 shows a top or plan view of a device embodying my invention applied to a door frame and door.

The dotted lines in said figure show the door in its position where the force of the spring is neutralized. Fig. 3 shows a detail sectional view of the pivoted end-of the cylinder, with the piston therein, andl ig. 4 shows a detail perspective view of the joint in the lever that is attached to the door. 7

Referring to the accompanying drawings, l

have used the reference numeral 10 to indirate the door frame, and 11 the door supportodl'iy the hinges 12.

My improved door check and spring comprises a bracket 13 designed to be perma nently connected. to a door frame above the one end of the bracket are two 14- errtended' at right angles to the bracket, and at the other end is an arm 15 extended at right angles to the bracket. Mounted on this arm 15 is a cylinder 16, said cylinder being connectedwith the arm 15 by means of a bolt 17 passed through an opening 18 in the arm, which is larger than the bolt, and nuts 19 are-placed on the bolt to hold it to the arm 15, said bolts, however, being so arranged as to allow a limited swinging movement of the cylinder relative to the arm 15. The cylinder is provided near its rear end with an adjustable vent plug 20, and at the other end of the cylinder is ahead 21 through which the piston rod 22 is extended. A piston 23 is mounted on the inner end of the rod within the cylinder in the ordinary way.

Fulcrumed between the arms 14: is a lever comprising a body portion 24 and an extension 25, arranged at an angle of about degrees relative to the body portion. The outer end of this extension is pivoted to the piston rod 22. that when the door is closed, thebody portion of the lever will stand at substantially right angles to the door frame, and the extension 25 thereof will project toward the hinged edge of the door, as clearly shown in Fig. 1. At the outer end of the lever 24 is a notch 26 and pivoted to the outer end of the lever 24- is a link 27 having a lug 28 thereon extended downwardly under the lever 2 1 to co-act with the notch 26 in limiting the movernent of the link 27 relative to the lever 24,

The other end of the link 27 is pivoted to a bracket 29 fixed to the door, as shown in Ifig. 1. The arrangement of these parts relative to each other and to the door, forms an important part of my invention, said parts being so arranged and assembled that when the door is in its closed position as shown In Fig. 1, the lever 24 will stand approximately at right angles to the door, and when the door is substantially at right angles to the door frame, the link 27 will be in line with the hinge point of the door. This feature is illustrated by dotted lines in Fig. 2, in which the dotted line marked sc:a is drawn through the hinge of the door.

The spring is indicated by the reference numeral 30. it is provided with hooks 31 at its ends, one of which is connected to the bracket 15 and the other .to one of the openings 82 in the lever 24. The arrangement of the spring is such that when the door is swung from its position substantially at right The said lever is so arranged its angles to the door frame, the spring will then tend to move the door open by drawin the end 25 of the lever 24 inwardly toward the door frame, and the end of the lever 24 that is connected with the link 27 away from the door frame. This will cause the door to swing farther open and be yieldingly held by the spring in said position. The lug 28 and the notch 26 will coact in preventin the joint between the" lever 24 and the lin 27 from moving outwardly when the door is in the osition last mentioned. If, however, the oor is moved from the position shown in dotted lines in Fig. 2, toward its closed position, then the pivotal point of the lever 24 and link 27 will move along the curved dotted line marked y, and hence the tension of the spring is exerted upon the lever 24 in a direction tending to force the door to its closed position and there yieldingly hold it.

In practical use, it is obvious that the device may be attached to a door and door frame, very quickly and easily by first disconnecting the spring at one end, then screwing the bracket 13 to the door frame, then attaching the spring at both ends so that the piston is moved thereby to a point near the pivoted end of the cylinder, then finally the racket 29 is placed on the door in position where it will be engaged by the link 27. All of the weight of the device is carried upon the bracketon the door frame. When the door is moved open, the piston 23 moves toward the free end of the cylinder and the air escapes around the piston rod. At the same time, the spring is stretched until the door stands in the position shown in dotted lines in Fig. 2. If the door is then released and swung shut. the spring will aid in closing it,

and the piston will prevent the spring from closing t e door too fast, because the air in the cylinder must esca e through the vent plug 20 and when the oor is moved from a position substantially at right angles to the door frame, to a wide open position, as shown by'solid lines in Fig. 2, then the spring tends to move the door to its wide open position, and the joint between the lever 24 and link 27 prevents said parts from swinging outwardly away from the door frame.

The device may be applied to a door that swings either to the right or to the left, by simply reversing the position of the lever 24 within the arms 14.

- Having thus described my invention, what I claim and desire to secure by Letters Patent, is-

In a device of the class described, a bracket designed to be fixed to a door frame, a cylinder connected to one end of the bracket and having a limited swinging movement relative thereto, a piston in the cylinder, a piston rod connected with the piston, a lever fulcruined at the other end of the bracket having an extension at one end arranged at an angle of about forty-five degrees relative to its body portion, said extension being connected to the piston rod, a spring adjustably connected to said extension and to the rear end of the bracket, a link ivoted to said lever, means for connecting t e other end of the link with a door, and means for limiting the pivotal movement of the link relative to the lever, substantially as and for the purposes stated.

RICHARD M. MICK. Witnesses:

FRANK CAMPBELL, W. A. AMSBERRY. 

